A63F 9/0873

A sphere rotatable with respect to an inner sphere

Official title: {a sphere rotatable with respect to an inner sphere}

A63F9/0873 (A sphere rotatable with respect to an inner sphere) appears on 13 US grants and 10 published applications in this corpus.

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Granted patents
13
Published applications
10
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6
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23
Latest grant
16 Mar 2021